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What is the limitation of first law of thermodynamic.

Posted by As K 8 years, 1 month ago

1 answers

Amar Kumar 8 years, 1 month ago

Limitations of the first law of thermodynamics are discussed below:

1. No restriction on the direction of the flow of heat: the first law establishes definite relationship between the heat absorbed and the work performed by a system. The first law does not indicate whether heat can flow from a cold end to a hot end or not. For example: we cannot extract heat from the ice by cooling it to a low temperature. Some external work has to be done.

2. Does not specify the feasibility of the reaction: first law does not specify that process is feasible or not for example: when a rod is heated at one end then equilibrium has to be obtained which is possible only by some expenditure of energy.

3. Practically it is not possible to convert the heat energy into an equivalent amount of work.

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What is Bomb calorimeter

Posted by Arjun Gupta 8 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Manjeet Singh 8 years, 1 month ago

There device which measure du and dh

2Thank You

Sanjana Singh 8 years, 1 month ago

Bomb calorimeter is a device that is used to measure delta U and delta H.

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What is diasteromers

Posted by Manish Bhardwaj 8 years, 1 month ago

CBSE > Class 11 > Chemistry

0 answers

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Why is Significant figure of 100 is 1

Posted by Akanksha Katoch 8 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Manjeet Singh 8 years, 1 month ago

Here there is no Unit so we do not count 0

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Calculate the wave number of second line of balmer series of hydrogen spectrum

Posted by Monisha Sp 8 years, 1 month ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Relationship between solubility product and molar solubility

Posted by Priya S 8 years, 1 month ago

CBSE > Class 11 > Chemistry

0 answers

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Balancing redox reaction

Posted by Ansh Sharma 8 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Arjun Gupta 8 years, 1 month ago

Look in CBSE guide. NCERT solutions of 18.8 question You will be able to understand.

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Manjeet Singh 8 years, 1 month ago

Cusou+Zn =znso4 +cu

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Can F (florine) have +1 oxidation state . According to me it is false as given in NCERT . Then how can oxidation no. of florine in HOF molecule is +1?

Posted by Neha Sorout 8 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

As K 8 years, 1 month ago

Oxidation state of flurine is -1 but in case of HOF molecule oxidation state of flurine is +1 because algebric sum of oxidation no. of all atoms in a compound is zero. Since ox-state of H atom is +1 & of oxygen is -2. Since ox-state of HOF molecule is zero. Then +1+ (-2) +F ~0 F~ +1 (this sign ~ indicate equal to)

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As K 8 years, 1 month ago

Oxidation state of F (flurine) is -1 but in HOF molecule

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Under what conditions the equilibrium between ice and water is established?

Posted by Vikas Dager 8 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Manjeet Singh 8 years, 1 month ago

When freezing and evaporation are included equality rate

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As K 8 years, 1 month ago

When rate of melting ice become equal to rate of freezing of water.

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What is delta H

Posted by Archit Khandelwal 8 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Priyanka Sharma 8 years, 1 month ago

Delta h is for heat enthalpy

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ANSWER

Application of thermodynamics.

Posted by Rishab Kumar 8 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Manjeet Singh 8 years, 1 month ago

For all devices who work on heat like thermometer

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As K 8 years, 1 month ago

Gas compressor and refrigerator work on second law of thermodynamic.

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What is alkali metals

Posted by Aviral Bajaj 8 years, 1 month ago

CBSE > Class 11 > Chemistry

3 answers

Arjun Gupta 8 years, 1 month ago

Li,Na,K,Rb,Cs,Fr, all are the alkali metals

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Manjeet Singh 8 years, 1 month ago

Element of first group are called alkali metals

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Sanjana Singh 8 years, 1 month ago

Alkali metals are those metals which form alkali (aqueous base )on mixing with water.

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The total no. of mono halogenated products formed by halogenation of 2,2,4-trimethylhexane are?

Posted by Ratan Poonia 8 years, 1 month ago

CBSE > Class 11 > Chemistry

0 answers

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What is oxidation no of ki3

Posted by Jasmer Panjetha 8 years, 1 month ago

CBSE > Class 11 > Chemistry

4 answers

Manjeet Singh 8 years, 1 month ago

-1

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Himanshu Sharma 8 years, 1 month ago

-1

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Akash Rastogi 8 years, 1 month ago

K+[i-i~i]- isme i i bond ki 0 or k ki plus 1 to i ki minus 1 so ans is -1

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Faiz Ahmad 8 years, 1 month ago

-1

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In comparison is the temperature high and low

Posted by Aman Rawal 8 years, 1 month ago

CBSE > Class 11 > Chemistry

0 answers

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In compression is the temperature high or low?

Posted by Chetna Sachdeva 8 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Manjeet Singh 8 years, 1 month ago

Pressure and temperature are inversely proportional ritika ji????✌

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Nikhil Yadav 8 years, 1 month ago

Temperature increases .Because pv=nrt hence because of compression pressure increases and hence the temperature

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What is equlibrum

Posted by Yash Kushwaha 8 years, 1 month ago

CBSE > Class 11 > Chemistry

4 answers

Manjeet Singh 8 years, 1 month ago

The balance state in which the changes done in such a way that is seeds to bed not change in state??

1Thank You

Sanjana Singh 8 years, 1 month ago

Equilibrium is a state where rate of forward reaction is equal to rate of backward reaction.

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Dheeraj Rajput 8 years, 1 month ago

In chemistry ,the equilibrium is defined as the state in which both the rate forward and backward reaction is same

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Simran Khan 8 years, 1 month ago

Equilibrium is a state in which both the forward and backward reaction has taken place simultaneously.

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CH3 Ch Ch double bond Ch Ch 2 Ch triple Bond CH ka nomenclature

Posted by Sneh Kumar Soni 8 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Himanshu Sharma 8 years, 1 month ago

6methyl,4butene,1,the

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Why iron get brown when put in copper sulphate solution

Posted by Sunil Yadav 8 years, 1 month ago

CBSE > Class 11 > Chemistry

3 answers

Manjeet Singh 8 years, 1 month ago

It is displacement reaction ???

0Thank You

Nikhil Yadav 8 years, 1 month ago

Iron is a more reactive metal then copper hence it displaces copper from its solution and this copper deposits on iron .as copper is brown in colour hence iron rod appears brown

1Thank You

Simran Khan 8 years, 1 month ago

Due to deposition of copper on the iron as the reaction takes place is displacement reaction ,so iron takes place of copper and the copper deposited on it this is done because iron has more reactivity than copper

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How are free radicals and carbocations produced? Discuss there relative stability?

Posted by Aafaq Amin 8 years, 1 month ago

CBSE > Class 11 > Chemistry